Improved bi-functional oxygen electrocatalytic performance of PteIr alloy nanoparticles embedded on MWCNT with Pt-enriched surfaces
| dc.contributor.author | Bhuvanendran, Narayanamoorthy | |
| dc.date.accessioned | 2021-04-15T14:07:13Z | |
| dc.date.available | 2021-04-15T14:07:13Z | |
| dc.date.issued | 2020 | |
| dc.description.abstract | Multi-walled carbon nanotube supported PteIr nanoparticles (PteIr/MWCNT) with different elemental ratios were synthesized by one-pot co-reduction approach under ambient conditions. The PteIr catalysts exhibit improved bi-functional activity towards oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) and its electrocatalytic performance was clearly established using different physiochemical characterization techniques. The PteIr composition of 2:1 has a higher electrochemical surface area (ECSA) of about 85.3 m2 /g compared to other compositions (3:1 and 1:1) and Pt/MWCNT due to the effect of particle size distribution. The improved ORR/OER activity was found to be 139.4 and 740 mA/mg, respectively, for PteIr(2:1)/MWCNT with the potential difference of 760 mV for oxygen bi-functional activity. Furthermore, PteIr(2:1)/MWCNT showed much better stability for ORR compared to other compositions and Pt/MWNCT catalysts, i.e., around 76% of its initial ECSA retained with <20 mV shift in half-wave potential was obtained even after 10,000 potential cycles in acidic medium. It is believed that the Pt enriched surface, amount of Ir content, induced electronic and geometric effects play a vital role on the electrocatalytic activity enhancement of PteIr(2:1)/MWNCT as effective bi-functional oxygen electrode. | en_US |
| dc.identifier.citation | Bhuvanendran, N., Ravichandran, S., Jayaseelan, S. S., Xu, Q., Khotseng, L., & Su, H. (2020). Improved bi-functional oxygen electrocatalytic performance of Pt–Ir alloy nanoparticles embedded on MWCNT with Pt-enriched surfaces. Energy, 211. | en_US |
| dc.identifier.uri | doi: 10.1016/j.energy.2020.118695 | |
| dc.identifier.uri | http://hdl.handle.net/10566/6061 | |
| dc.language.iso | en | en_US |
| dc.publisher | Energy | en_US |
| dc.subject | PteIr alloy | en_US |
| dc.subject | Lattice strain | en_US |
| dc.subject | Oxygen bi-functional electrode | en_US |
| dc.subject | Mass activity | en_US |
| dc.subject | Durability | en_US |
| dc.title | Improved bi-functional oxygen electrocatalytic performance of PteIr alloy nanoparticles embedded on MWCNT with Pt-enriched surfaces | en_US |
| dc.type | Article | en_US |